Daan District, one of which located in the core of Taipei City covers a total area of approximately 11.3614 square kilometers, with a population of 315,714 people; on average only 1 square inch per person. In such a crowded city, parks take very important roles for providing a natural environment for the people living around it. However, as the increased use in imperviousness pavements, and RC pavement in the parks, will lead to the soils on the ground unable to breathe normally. Preventing the natural law of the cycling in between soil and water, which further looses the potential of adjusting the climate and water; increasing the Peak flow of the city. These are the indirect causes of urban warming and urban heat island effects.
